Charles koon



- UNITED STATESPATENT OF E CHARLES KOON, OF WHITING, IOWA, ASSIGNOR OF ONE-HALF TO WASHING- TON A. KOON, OF SAME PLACE.

DOOR-SPRING.

SPECIFICATION forming part of Letters Patent No. 486,975, dated November 29, 1892.

Application filed May 12, 1892. Serial No. 432,792. (No model.)

To all whom it may concern:

Be it known that 1, CHARLES, KooN, a citizen of the United States, residing at Whiting, in the county of Monona and State of Iowa, have invented a new and useful Door-Spring, of which the following is a specification.

This invention relates to door-springs; and it consists of the construction and arrangement of the parts thereof, as will be more fully hereinafter described and claimed.

The object of the invention is to simplify the construction of devices of this character, and to provide a more positive action and at the same time insure a strength and durability of the several parts to resist strain and wear brought to bear upon the same, and also to reduce the cost to a minimum.

In the drawings, Figure l is a perspective View of a door and a portion of the framing thereof, with the improved device applied thereto. Fig. 2 is a transverse section on the line w m of Fig. 1. Fig. 3 is a detail perspec tive view of the improved device removed.

Similar numerals of reference are used to indicate corresponding parts in the several figures.

Referring to the drawings, the numeral 1 designates a door of preferred ,form of construction, which is connected to a framing 2 by hinges 3 of any suitable construction. On the framing 2 is secured a plate 4, having ears 5 and an apertured lug 6. The sleeve 7, at

an angle to and formed with the end of a rod' or bar 8, is pivotally connected between the ears 5 by a pintle 9, passing through said parts and secured at its opposite ends. The said rod or bar 8 is constructed with an angular bend 10 in the body thereof, wherein is situated an eye 11, and the free end of said rod or bar freely extends through a loop 12, secured to the door, and has an aperture 13 in its extreme outer end.

One end of a retractile spring 14 is secured to the apertured lug 6 of the plate 4, and the opposite end of said spring is connected to the eye 11 on the bar or rod 8. When the door is opened, it draws against the resistance of the said spring 14, which has a normal tendency to close the door, and at the same time the rod or bar 8 moves through the loop 12 as the door is opened toward the plate at. To avoid binding of the rod or bar 8 in the loop 12 in the movement of the latter therethrough, the outer portion of said rod or bar between the bend l0 and the extremefree end thereof is slightly curved, as at 15, to thereby compensate for the are described by the door in its movement.

To hold the door open permanently, when so desired, a hook 16 is secured thereto by a staple 17 or other analogous device, which is adapted to engage the aperture 13 in the end of the rod or bar 8. This hook is so located that the door will be fully held open when the same is in engagement with the said rod or bar.

The rod or bar 8, which forms a lever, is more than half as long as the door to which it is applied is wide, thereby applying a closing power to the door farther-from the hinges thereof than in devices of this character, as. usually constructed and arranged, and by this means less strain is exerted upon the hinges. The coiled spring is located under the rod or bar 8, and is thereby fully and completely protected from contact with other objects and consequent injury to the same. The spring works in a straight line, which is not in the least Varied by the position or angle of the door, and will therebyexert a greater force in proportion to the weight of the spring. The several parts can be so arranged asto hold the door at any angle for any length of time desired, and when the door is forced closed by the spring and the several attachments set forth, recoil or backward movement of the door is prevented, as the spring is constantly pushing against the door.

It is obviously apparent that the device may be applied to any structure other than a door, as shown, with equal efficiency of operation.

Having thus described the invention,what is claimed as new is- In a device of the character set forth, the combination of a framing, a plate secured to said framing and having ears and an apertured lug, a rod or bar having an end thereof pivotally mounted in said ears,a door having In testimony that I claim the foregoing as a loop thereon through which the end of the my own I have hereto aifixed my signature in IO rod or bar freely passes, a spring secured to the presence of two witnesses.

said apertured lug of the plate at one end and to the said rod or bar at its opposite end, CHARLES KOON. and a hook attached to the door and adapted Witnesses to engage the said rod or bar, substantially FREDMOOAUSLAND,

as described. L. E. CHRISTIE. 

